It was revealed this week that from July 18, pubs, clubs and bars across central Sydney would be banned from serving shots, doubles and premixed drinks with more than 5 per cent alcohol content after midnight.

Customers will also be prevented from buying more than four drinks at a time after midnight and more than two drinks after 2am.

The new ban is part of ongoing efforts by New South Wales police and the government to decrease alcohol-fuelled violence.

Alchemy duty manager Jordan Yates said he didn't think time restrictions would make a drastic difference to violence and that it also wouldn't work in Tasmania.

``At the end of the day, it comes down to responsible service of alcohol,'' he said.

``People will find a way to consume more alcohol anyway.''

Star Bar owner Michael Acquarola said his Charles Street venue already stopped serving shots at midnight, but that was its own decision.

He said many other venues had similar in-house restrictions and that it should be up to them to make up their own minds rather than blanket bans.

``If we got to the point where there was evidence to show that shots after midnight or certain strength alcoholic beverages needed to be looked at, then obviously we're happy to sit down with government bodies,'' he said.